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diff --git a/test/lisp/progmodes/octave-tests.el b/test/lisp/progmodes/octave-tests.el
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+++ b/test/lisp/progmodes/octave-tests.el
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+;;; octave-tests.el --- Test suite for octave.el  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2021 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'ert)
+(require 'octave)
+
+(defun octave-test--indent (string)
+  (with-temp-buffer
+    (octave-mode)
+    (insert string)
+    (indent-region (point-min) (point-max))
+    (buffer-string)))
+
+(ert-deftest octave-tests--continuation-indentation ()
+  (should
+   (equal (octave-test--indent "a = b + a * \\
+c;
+")
+          "a = b + a * \\
+	c;
+"))
+  (should (equal (octave-test--indent "a = \\
+b;
+")
+                 "a = \\
+  b;
+")))
+
+;;; octave-tests.el ends here